XML 82 R84.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2

Leases - Summary of the Effect of the Amortization for Ground Lease Intangibles (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property and Maintenance [Member]
Ground lease intangible amortization	$ (4,463)	$ (4,463)	$ (4,369)

X

- Definition

Ground lease intangible amortization.

+ References

No definition available.

+ Details

Name:	eqr_GroundLeaseIntangibleAmortization
Namespace Prefix:	eqr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Details

Name:	us-gaap_IncomeStatementLocationAxis=eqr_PropertyAndMaintenanceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: